<?php

namespace App\Http\Controllers;

use App\Handlers\ImageUploadHandler;
use App\Models\Category;
use App\Models\Topic;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Http\Requests\TopicRequest;

class TopicsController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth', ['except' => ['index', 'show']]);
    }

	public function index(Request $request,Topic $topic)
	{
		$topics=$topic->withOrder($request->order)->paginate(20);
		return view('topics.index', compact('topics'));
	}

    public function show(Request $request,Topic $topic)
    {
        //url矫正
        if (!empty($topic->slug) && $topic->slug!=$request->slug){
            return redirect()->to($topic->link(),301);
        }
        return view('topics.show', compact('topic'));
    }

	public function create(Topic $topic)
	{
	    $categories=Category::all();
		return view('topics.create_and_edit', compact('topic','categories'));
	}

    public function store(TopicRequest $request, Topic $topic)
    {
        $topic->fill($request->all());
        $topic->user_id = \Auth::id();
        $topic->save();

        return redirect()->to($topic->link())->with('success', '成功创建话题！');
    }

	public function edit(Topic $topic)
	{
        $this->authorize('update', $topic);
        $categories=Category::all();
		return view('topics.create_and_edit', compact('topic','categories'));
	}

	public function update(TopicRequest $request, Topic $topic)
	{
		$this->authorize('update', $topic);
		$topic->update($request->all());

		return redirect()->to($topic->link())->with('message', '更新成功');
	}

	public function destroy(Topic $topic)
	{
		$this->authorize('destroy', $topic);
		$topic->delete();

		return redirect()->route('topics.index')->with('message', '成功删除');
	}


	public function uploadImage(Request $request,ImageUploadHandler $uploader)
    {
        //初始化返回数据，默认是失败的
        $data=[
            'success'=>false,
            'mas'=>'上传失败',
            'file_path'=>''
        ];

        //判断是否有上传文件，并赋值给$fiel
        if ($file=$request->upload_file){
            //保存图片到本地
            $result=$uploader->save($request->upload_file,'topics',\Auth::id(),1024);
            //图片保存成功
            if ($result){
                $data['file_path']=$result['path'];
                $data['msg']="上传成功";
                $data['success']=true;
            }
        }
        return $data;
    }
}